Blower motors runs at high speed all the time the key is on. First the fan didn't work at all but I replaced the fan and now it runs all the timeBlowers runs when key is on at high speed
Blower motors runs at high speed all the time the key is on. First the fan didn't work at all but I replaced the fan and now it runs all the time

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The plenum may be cracked, check for air blowing out where it should not, or the blender door is not opening, a cable sheath may have popped loose, or the heater core itself is clogged with leaf debris blocking air flow..

No hot air is due to low coolant, or even poor coolant flow. The engine heats up the coolant, and it passed through your heater core, and the heater blower motor pushes air through the heater core to warm up the air. If your "fan"is working, but the air is cold, make sure your coolant level is good.

A leaking A/C unit tends to get grimy, decreasing air flow. Have your refrigerant pressure checked, If it is low, have the mechanic open up the HVAC system and clean the grime off the AC condenser with some solvent, or do an expensive A/C repair. Also of note: Some 2002 SL models were equipped with cabin air filters. If you have one, get it replaced.